Someone please help me with this question

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.